Răspuns :
a+b=150.2=300
a.4=b.5=k
a=k/4
b=k/5
k/4+k/5=300
5k+4k=20.300
9k=6000
k=6000/9=2000/3
a=2000/3:1/4=500/3
b=2000/3:1/5=400/3
a.4=b.5=k
a=k/4
b=k/5
k/4+k/5=300
5k+4k=20.300
9k=6000
k=6000/9=2000/3
a=2000/3:1/4=500/3
b=2000/3:1/5=400/3
ma=(a+b)/2=150
a+b=150*2
a+b=300
a,b ip cu 4,5
4a=5b=k
a=k/4
b=k/5
k/4+k/5=300 aducem la acelasi numitor
5k+4k=6000
9k=6000
k=6000/9= 2000/3
a=2000/3/4= 2000/3 * 1/4= 500/3
b=2000/3/5= 2000/3 *1/5= 400/3
a+b=150*2
a+b=300
a,b ip cu 4,5
4a=5b=k
a=k/4
b=k/5
k/4+k/5=300 aducem la acelasi numitor
5k+4k=6000
9k=6000
k=6000/9= 2000/3
a=2000/3/4= 2000/3 * 1/4= 500/3
b=2000/3/5= 2000/3 *1/5= 400/3